Electric switch.



A. SIMON.

ELECTRIC SWITCH.

APPLICATION FILED IUNE 29 ISH 1,241,157. Pmmdsept. 25,1917.

UNITED STATES PATENT OFFICE.

ARTHUR SIMON, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLEBf-HAMMER MFG. C0., OF MILWAUKEE, WISCONSIN, A CORPORATION 0F WISCONSIN.

ELECTRIC SWITCH.

Original application filed June 1, 1909,

To all whom it may concern:

Be it known that I, ARTHUR SIMON, a. citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Electric Switches, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to improvements in electric switches.

The present application is a division of my prior application, Serial No. 499,545, filed June 1, 1909, said prior application disclosing the same embodiment of the invention as that illustrated and described herein.

Switches embodying the invention are susceptible of advantageous use in various different relations, and as exemplified in my prior application aforesaid, are particularly adapted for use as current relays in alternating current motor control systems.

The various objects and advantages of the invention will be apparent from the embodiment of the invention illustrated in the accompanying drawing.

In the accompanyingr drawing,

Figure 1 is a front elevation of the switch;

Fig. 2 isa bottom plan view thereof with certain paiits broken away; and,

Fig. 3 is a sectional View on line 3 3, Fig. 1.

The several parts of the switch are mounted upon an insulating panel 1 and said parts include a magnet frame 2 having mounted thereon three electromagnets 3, 4 and 5, a pivoted magnetic armature 6 common to all of said magnets and a contact disk 7 carried by said armature to coperate with contact studs 8 and 9 on the panel 1.

The magnetic frame 2 comprises a transverse strip and three vertically disposed s ections 10, 11 and 12 to support the windings 3, 4 and 5 respectively. Referring to Figs. 2 and 3, the section 11 has a substantially right angle base carrying a hollow cylindrical part 13 upon which the winding 4 is coiled. The end of the hollow member 13 is closed by a magnetic plug 14 preferably threaded therein. The sections 10 and 12 of the magnet frame are of the same construction as the section 11 and their wind- Specifcation of Letters Patent.

Patented Sept. 25, 1917.

Serial No. 499,545. Divided and this application led June 29, 1914. Serial No. 847,936.

ings are mounted thereon in a similar manner. Further referring to the construction of the sections 10, 11 and 12 of the frame, each is provided with a longitudinal slot 15 extending into its respective plug 14 t'o reduce the eddy currents produced upon energization of the windings and the attraction of their armature.

The armature member G comprises a crosshar having thereon three upwardly extending cylindrical projections 16, 17 and 18 projecting into the tubular sections 10, 11 and l2 of the frame and forming plungers for the windings 3, 4 and 5 respectively. The armature 6 is pivotally supported on a rod 19 in turn supported by the frame 2 whereby the armature is permitted a rocking movement and the cylindrical projections thereof are permitted a substantially reciprocable movement within their respective windings. The windings when energized act upon their plungers to jointly attract the armature 6 in one direction while a tension device hereinafter described biases said armature in a reverse direction. As will be understood, the windings tend to cause their respective plungers to seal with their respective plugs and if such sealing is effected the parts tend to stick upon denergization of the windings. This tendency however is overcome in the switch illustrated by small lugs or projections 20 on the several plungers which maintain an air gap between said plungers and their respective plugs.

The aforesaid tension device, as illustrated, comprises av bolt 21 seated in the panel 1 and projecting through a downward extension 22 of the armature. The bolt 21 carries at its outer end a thumb-nut 23 and between said nut 23 and the extension 22 of the armature a helical extension spring 24. The spring is thus so confined as to press the extension of the armature toward the panel 1 and in consequence oppose attraction of the armature by the windings. As' will be. understood, the nut 23 enables adjustment of the spring tension to regulate the sensitiveness of response of the armature.

The contact disk 7 is fixed to the extension 22 of the armature whereby it engages its contacts 8 and 9 in normal position of said armature. On the other hand, it is withdrawn from engagement with its con` tacts upon attraction of the armature by the aforesaid windings.

The windings each comprise a Hat Strip of conductin niaterial coiled fiatwise with a strip 25 o suitable material to insulate the turns thereof from one another. The inner end of each winding is riveted or otherwise secured in electrical contact with its respective section of the magnet frame and thus in electrical connection with the corresponding terminals of the other two windings. On the other hand, the outer terminals of the windings 3, 4 and 5 are electrically independent, being connected to binding posts '26, 27 and 28 respectively provided on the panel 1. This arrangement is particularlyadvantageous for alternating current circuits, providing for star7 connection of the windings with each in a different phase of the circuit.

While the switch as illustrated is provided with three windings with certain inter-connections, it should be of course understood that the number and connections ot windings may be varied as desired. Also it will be understood that other forms and arrangements of switch contacts might be adapted in lieu of those illustrated.

Vhat I claim as new and desire to secure by Letters Patent is i l. In a polyphase alternating current switch, inA combination, a base, a bar of magnetic material mounted thereon, a plurality of magnetic members extending substantially perpendicularly from said bar, eachof said members having a tubular part, a phase winding mounted on the tubular part of each of said members, a common armature for said windings supported adj acent thereto and having aV plurality of extensions to respectively enter said tubular parts of said magnetic mem-bers and a switch Contact operable by said armature.

2. In a polyphase alternating current switch, in combination, a base, a bar of magnetic material mounted thereon, a plurality of magnetic members extending substantially perpendicularly from said bar, each of said members having a split tubular part closed at one end by a similarly split lug, a phase winding mounted on the tubuar part. of each of said members, a common armature for said windings support/ed adjacent thereto and having a plurality of extensions to respectively enter said tubular parts of said magnetic members, and a switch contact operable b said armature.

3. In a polyphase a ternating current switch, in combination, a base, `a bar of magnetic mter'ral-mounted thereon, a plurali'ty of magnetic members extending substantially perpendiculariy from said bar, each of Vsaid fmembershavlng a tubular part, a. phase winding comprising a flat conductive strip wound fiatwise about-the tubular part ofeaoh of said'members and initially in contact therewith, a common armature for said Windingssuppoited adjacent thereto and having a plurality of extensions to respectively enter said tubular parts of said magnetic members, and a switch contact operable by said armature.

4. In a polyphase alternating current switch, in ccmblnation, a base, a bar of magnetic material .mounted thereon, a plurality of magnetic members extending substantially perpendicuiarly from said bar, each of said members having a tubular part, a phase windingfmounted yon the tubular part of each of said members, a common armature forV said windings pivotedy for movement relative thereto, saidarmature including an elongated body :having .angularly extending parallel portions movable within the tubular parts of the respective magnetic members, and a contact carrying arm extending from the opposite side of said body.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses. i

ARTHUR SIMON.

Witnesses:

Timm Baer, L A. WA'rsoN.

Genies ot this patent may be obtained for iive cents each, hy addressing4 the Commissioner of Patents. Washington, YD. C." 

